Steam-generating apparatus.



PATENTED AUG; 11, 1908.

J. ATWOOD & G. ESOHER. STEAM GENERATING APPARATUS.

APPLICATION FILED SEPT.23,1907.

INVENTORS 5115120 [War W1 TNESSES Ami mg JOSEPH ATWOOD AND GUSTAVESCHER, OF

WASHINGTON, DISTRICT OF COLUMBIA.

STEAM-GENERATING APPARATUS.

Specification of Letters Patent.

Patented Aug. 11, 1908.

Application filed September 23, 1907. Serial No. 394,125.

To all/whom it may concern:

Be 1t known that we, JOSEPH ATwooD and GUs'rAv EsoHER, citizens of theUmted States, and residents of Washington, in the District of Columbia,have mvented an Improvement in Steam-Generating Apparatus, of which thefollowing is a specification.

This invention is an improvement in steam heating apparatus, andparticularly in the means for generating the steam; and the inventionconsists in certain novel constructions and combinations of parts aswill be hereinafter described and claimed.

In the drawing, Figure 1 is asectional elevation of an apparatusembodying the invention. Fig. 2 is a detail view illustrating theregulating device for controlling the passage of gas tothe burners. Fig.3 is a detail View illustrating the damper controlling the passage ofair to the forced draft pipe; and Fig. 4 is a vertical section.

' In carrying out the invention, we employ a pair of boiler sections Aspaced apart, arranged preferably in axial alinement, and connected byupper and lower pipes B and C, which open at their opposite ends intothe boiler sections A, and form connections between the same. A pipe Bleads upward from the pipe B, and forms a feed pipe furnishing thesupply of steam to the radiators, not shown, and the pipe C is providedon opposite sides of its center with depending pipes C, forming waterlegs in connection with the lower pipe 0, as shown. The pipe B connectswith the pipe B, through a suitable coupling, and the water legs 0connect with the pipe C through suitable couplings as shown. Flue tubesD open at their lower ends at the lower ends of the legs C, and eX- tendupwardly therein andthence bend laterally outward through the tube 0,and extend thence longitudinally within the boiler sections A, are bentupwardly at D near the outer ends of the boilersections A, and

= returned within the boiler sections and extend at I) out through theinner end plates of the boiler sections A, and connect at their adjacentends by means of suitable couplings with a forced dr'aft pipe E, whichmay discharge at its upper end to the air or to any suitable connectionwith a chimney, and is provided at its middle at its lower end with anair inlet pipe F, having a damper F, controlling the amount of airsupplied.

Manifestly, suitable packing is provided where the pipes B and C connectwith the boiler sections, and tions of the flue tubes ner end plateswhere the return por- D pass through the inof the boiler sections, aswell as where the flue tubes D connect with the lower ends of the waterlegs C, and this packing may be effected in the manner shown in thedrawing, or in any suitable manner, as will be understood by thoseskilled in the art.

Burners G, which may be of the Bunsen type, are mounted on a gas pipe G,supplied through a feed pipe H, having a valve H, the supply pipe Iconnecting with the pipe H through a cylinder J having outlet openings Jand J the latter being preferably arranged in a series as shown. Aplunger K operates in the cylinder J, and is connected with the rod L ofa piston L operating in a cylinder M, and exposed to the pressure of thesteam by means of a pipe M connecting it with the pipe B, the latteralso having a steam gage N suitably connected with it to indicate thepressure. The cylinder M has a blow-off or exhaust port M and the steamactuated piston L operates to regulate the amount of gas supplied to theburners in proportion to the steam pressure, the latter as it increasesreducing the supply of fuel, and thus reducing the'steam generated, aswill be understood from the drawing.

It will be noticed that we provide the boiler in sections with hot airflues receiving the heat directly from the burners and extending upthrough water legs, and thence laterally through tubes connecting theboiler sections, and circulating within the boiler sections, and thencepassing out between the same.

A float O in one of the boiler sections A, operates through a suitablevalve to control the feed of water to the boiler, and maintain the waterline at the desired level.

In the construction shown, we provide a bracket P supporting the gaspipe G, from the pipe C, and we also provide brackets Q and R, theformer supporting the gas supply pipe above the cylinder J, and thelatter forming a support for a weight carrying lever R which operatesupon the rod L of the piston L, as shown in Fig. 1 of the drawing.

It should be understood that our invention is especially designed foruse with gas and for suspending from the ceiling of a room, thegenerating apparatus being comparatively small, and it being desirableto utilize the steam generated in two opposite boilers in order tosupply the volume of steam necessary for the heating apparatus and insuspending the two boilers in order to avoid any racking or straining ofthe, joints, we find it desirable to connect the boilers above and belowa central point so that the lower connecting pipe C will brace theboiler sections apart at their lower ends and the upper pipe B willbrace them apart at their upper ends so that the weight of the water inthe two boilers and of the boilers themselves will 'be borne in such amanner as to relieve the racking and straining before referred to. Alsoin utilizing the heat of the gas and in applying such heat to theboilers I find it convenient to provide a connecting pipe with thedepending water legs as best shown in Fig. 1 to facilitate theapplication of the heat in a simple and eflicient manner.

We claim:

1. An apparatus substantially as described, comprising a pair of boilersections spaced apart, upper and lower pipes connecting said sectionsand establishing communication between the same, a supply pipe leadingfrom the upper connecting pipe, a pair of pipes depending from the lowerconnecting pipe and forming water legs, flue tubes connecting with thelower ends of the water legs and extending upwardly therein and thenceextending outwardly within the lower connecting tubes, andlongitudinally within the boiler sections, and returned within theboiler sections, and extending out through the inner end plates thereof,a draft pipe to which the upper ends of the flue tubes are connected,said draft pipe having an air vent provided with regulating means,burners below the flue tubes, and a gas pipe supplying fuel to saidburners, substantially as set forth.

2. The combination in an apparatus substantially as described, of boilersections spaced apart, upper and lower pipe connections extendingbetween and establishing communication between the said sections, thelower connecting pipe having depending pipes forming water legs, fluetubes extending upwardly through said water legs and thence laterallythrough the connecting pipes into the boiler sections, and circulatingwithin the latter, and extending out of the boiler sections,substantially as and for the purposes set forth.

3. The combination with a boiler section having a pipe in communicationtherewith said pipe being provided with a depending water leg, of an airflue extending upwardly within said water leg and thence through theconnecting pipe into the boiler section and circulated within thelatter, and extending out of the boiler section to discharge at theoutside thereof, substantially as set forth.

4. The combination with opposite boiler sections, of a water pipeconnecting and establishing communication between said sections andhaving depending pipes forming water legs, flue tubes extending upwardlywithin the water legs and thence laterally within the connecting pipeinto their respective boiler sections, and circulated within the latterand extending out of their boiler sections, and a draft pipe to whichthe upper ends of the flue tubes are connected, substantially as setforth.

5. In an apparatus substantially as described, the combination with apair of boiler sections spaced apart, a pipe connecting and establishingcommunication between the sec tions and provided with depending pipesforming water legs, flue tubes extending upwardly in said water legs andthence laterally within the connecting pipes into their respectiveboiler sections, and circulated within the latter, and thence extendingout of their boiler sections and connecting with a common dischargepipe, substantially as set forth.

6. The combination of opposite boiler sections spaced apart, a pipeconnecting and establishing communication between said boiler sections,and having depending pipes forming water legs, flue tubes extendingupwardly within their respective water legs, thence laterally outwardthrough the connecting pipe into their respective boiler sections andcirculating within the latter, and extending out of their respectiveboiler sections, substantially as set forth.

7. An apparatus substantially as described, comprising a pair of boilersections spaced. apart, upper and lower tubes connecting said sectionsand pressing the same apart above and below an intermediate point, asupply pipe leading from the upper connecting pipe and adapted tosupport the apparatus, flue tubes connected with the lower connectingpipe and open at one end to re ceive the heat and disposed thence withintheir respective boiler sections, and extending at the other ends out ofthe said boiler sections substantially as and for the purposes setforth.

JOSEPH ATWOOD. GUSTAV ESCHER. WVitnesses I. GREENBAUM, HERMAN 0. Porn].

